Hello @astronomer44
This plugin uses the same ReCaptcha Integration screen as Contact Form 7 does for their ReCaptcha v3 Keys. Entering your keys here will save them to the Contact Form 7 settings which this plugin uses during output.
https://www.ads-software.com/plugins/wpcf7-recaptcha/#installation
You would enter your v2 API Keys into the same Integration screen and ensure that this plugin’s settings (Contact Form 7 > ReCaptcha Version) are set to use reCaptcha v2. Hopefully, using the above instructions, you’re able to get your reCaptcha working properly. Should you have any questions or run into any other issues, please reply back to this thread, and we can assist further. Have a wonderful rest of your week!